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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STV3550 датащи(PDF) 33 Page - STMicroelectronics |
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STV3550 датащи(HTML) 33 Page - STMicroelectronics |
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33 / 144 page  STV3550 33/144 3.3.6.3 Grey Stretch In Grey Stretch mode, the Black and White Stretch values are combined to increase the contrast in both the black and white parts of the image. This function decreases the black level in the dark part of the image and increases the white level in the bright part. It can be used to increase the global contrast on low-contrast sequences that are centered on the average brightness. By default, the inflection point is based on the value of the average brightness, but another value can be set by the user. In this case, the range parameter is used to modify the slope of the central segment. The gain parameter magnifies the correction factor and modifies the global curves in relation to the standard linear curve. Figure 22 shows the grey stretch algorithm with various range values. Table 10: Range and Slope Values Range Slope 00.25 10.50 20.75 31.00 Figure 22: Grey Stretch |
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